Manufacture of flexible metal hose



E. SCHRODER.

MANUFACTURE OF FLEXIBLE METAL HOSE.

APPLICATION FILED JAN.13, 1917.

1 ,407,001 Patented Feb. 21, 1922.

v e profile of o reiirleririg tight Applies-tier. flied January 18, 1817, 33o.

To all whom it may cow/tern;

Be it known tliot ll, EDMUNB Scrreoo subject of the German-Emperor, eiicl resioetit of Berlin, in the Gerroeii Empire, lieve veritecl certain new eml useful lmprove in the Manufacture of rlexilole Metal in. of WlllC'll the iollovvingis specification.

Flexible metal hose hereto-lore menuioeturecl by coiling e metel oi appropriate profile oroiinol s moriclrel, pecking materiel needed to render the nose lieving been subjected to o sirriil ceolure. In order to economize siicli riel in certain cases, the spiral joining edges of tlie coileil met l bone. eutogenously Welded. The auto irig process was accomplishes by the oining edges of the m ll subsequently flattening by W 4. rel-shaped collar thus formei. Q is tedious esvvell as expensive l permit carrying out the Welding ope at olt-ices other than the outer sitles profile, the Welded seem Toeirig rather easily olemegerl.

These enol other oliserlveiiteges ere come loy my invention which utilizes e tricol Welding in lieu of etitogenoiis iiig, There is proclucerl loy eicl of appropriate type of electrical welrlirig cliiiie a practically smooth, spirally Welel tube from o metal serial Without The metal band tub-sis then provided v lole, tlret is, forming it e flexible loose. The profile rosy loe goroclocerl Eli immeoiotely otter Welding the mote loose, or at any desirecl time thereafter, and it osy be formed. either as s spiral groove or as spiral grooves erroiigeol in parallel, or a series of annular grooves, as may be clesirerl or referred.

lo the accompanying olrevviog tlZlGiS is shown diagrammatically an illustrative erotodiment of my invention in which clrmm ineii igiire l is perspective vievv showing; the formation of e web of metel into o to as;

Figure 2 is at sicle elevation of the some; and

Figure 3 shows, pertly in section partly in elevation, one form of profiling means.

In eecorrlence with the foregoing emlcooli= merit of my invention, it Welo of J too eleotro e t; since er- "ectrocles orlrriits the terlength iiiosmii as J opetle tlie menipulelion of the w cleeii may be given to r s" oral o oer female proroll ti, 7 rolls osing suitably eel oritl co-ec to force the tube 0 irel grooves, illost etecl ell-s 5 5 ere mountecl 2 also 7, respectively,

31 shaft 8, soicl together in Jo evoiol st '1e olsove-cles proc iii L Y 3C1 militia 0t it etol I "entionecl, my improved possesses e peculiar advantage in employs electrical Welding. The 10 i2; 10 in this case largely ii1clepen6leiit of ,ie "wor'lorions slrill encl proceeds more Finally, the eclges of the metal band overlap each other at time Welded seem "the seam is, in consequence thereof, tighter and more durable.

t is preferable to form the profile ioimeiii- Welling the metal bend. in oroler tilize the greater pliability oi the metal in consequence of the higher temperature which it has etteinedl during the WGl(llI1g-OP- 612L3Ji0i1,bllt the "formation of the profile may separate step in the method and additional heating may be employed to moire the soficiently pliable. ll iy improved methorl renders practicable the meiiuiecture oi tlexilole metal hose of greater length then hitherto, will in an on a tube, and

interrupted rocess, in contradistinction to the old stepy-step method.

I claim:

1. The method of manufacturing flexible metal hose, consisting in spirally winding a smooth metal band, uniting the overlapping edges of the band by electric welding so as to form the band into a tube, and lproviding the thus produced tube with a pro le adapt ed to render it flexible.

2. The method of manufacturing flexible metal hose, consisting in spirally winding a smooth metal band and simultaneouslyuniting the overlapping edgesof the band by electric welding so as to form the band into a tube, and providing the wall' of the tubethus produced with a profile running around the tube and adapted to render it flexible.

3. The method of manufacturing flexible metal hose, consisting in spirally winding a smooth metal band and simultaneously uniting the; overlapping edges of the band by electric welding so as to form the band into roviding the wall of the thus produced tu e with a profile running spirally around the tube and adapted to render it flexible.

4. The-method of manufacturing flexible metal hose, consisting in winding spirally a smooth metal band, uniting the overlapping edges of the band by electric welding so as to form the band into a tube, and providing the wall of the thus roduced tube immediatel after welding with a'profile adapted to ren er the tube flexible.

5. The method of manufacturing flexible metal hose, which comprises winding a substantially smooth metal band into a substantially spiral form with the adjacent edges over apping, we ding the overlapping edges so as to form a substantially continuously welded joint, and thereafter profiling the welded tube to render the same flexible.-

6. The method of manufacturing flexible metal hose, which comprises winding a substantially smooth metal band into a substantially spiral form with the adjacent edges overlapping, welding the overlapping edges so as to form a substantially continuously welded joint, and shortly thereafter, and before the heat of the welding operation has entirely disappeared, profiling the welded tube to render the same flexible.

In witness whereof I have hereunto signed my name this twenty-fifth day of October 1916, in the presence of two subscribing witnesses.

EDMUND soHRoDnR. Witnesses HENRY HAsPEa, ALLEN F. JENNINGS. 

